MediaWiki 1.30.0-alpha (1ba29a5) PHP 7.1.1 (apache2handler) PostgreSQL 9.3.12 ICU 57.1
When trying to access (in read mode) "Main_Page", MW throws:
Exception caught inside exception handler: [a9e417a3f6adab4fdd3391ee] /mw-master-pg/index.php/Main_Page Wikimedia\Rdbms\DBUnexpectedError from line 2910 of ...\includes\libs\rdbms\database\Database.php: Wikimedia\Rdbms\DatabasePostgres::reportQueryError: Expected mass rollback of all peer databases (DBO_TRX set). Backtrace: #0 ...\includes\libs\rdbms\database\DatabasePostgres.php(259): Wikimedia\Rdbms\Database->rollback(string) #1 ...\includes\libs\rdbms\database\Database.php(975): Wikimedia\Rdbms\DatabasePostgres->reportQueryError(string, string, string, string, boolean) #2 ...\includes\libs\rdbms\database\Database.php(1339): Wikimedia\Rdbms\Database->query(string, string) #3 ...\includes\cache\LinkBatch.php(211): Wikimedia\Rdbms\Database->select(string, array, string, string) #4 ...\includes\cache\LinkBatch.php(139): LinkBatch->doQuery() #5 ...\includes\cache\LinkBatch.php(128): LinkBatch->executeInto(LinkCache) #6 ...\includes\skins\Skin.php(265): LinkBatch->execute() #7 ...\includes\skins\Skin.php(145): Skin->preloadExistence() #8 ...\skins\Vector\SkinVector.php(47): Skin->initPage(OutputPage) #9 ...\includes\skins\SkinTemplate.php(248): SkinVector->initPage(OutputPage) #10 ...\includes\OutputPage.php(2428): SkinTemplate->outputPage() #11 ...\includes\exception\MWExceptionRenderer.php(136): OutputPage->output() #12 ...\includes\exception\MWExceptionRenderer.php(55): MWExceptionRenderer::reportHTML(Wikimedia\Rdbms\DBUnexpectedError) #13 ...\includes\exception\MWExceptionHandler.php(75): MWExceptionRenderer::output(Wikimedia\Rdbms\DBUnexpectedError, integer) #14 ...\includes\exception\MWExceptionHandler.php(141): MWExceptionHandler::report(Wikimedia\Rdbms\DBUnexpectedError) #15 ...\includes\MediaWiki.php(551): MWExceptionHandler::handleException(Wikimedia\Rdbms\DBUnexpectedError) #16 ...\index.php(43): MediaWiki->run() #17 {main}